I mean, you could cut the dialogue about healing requiring you to give away a bit of your own life, but that would make it amusingly overpowered. It would remove questions about how many years of life expectancy Rey gave away to heal that worm and Kylo’s fatal stab wound though. My preferred option is to keep Ben’s sacrifice - it is essentially his main redemptive act, and I think his selfless attempt to save someone from death does (for all the faults of the rest of the movie) act as a satisfying contrast to Anakin’s selfish attempt in ROTS - but then have him Force Ghost Ex Machina’d back into the living world. I just don’t think the movie places enough weight on Ben’s death to be able to not make it feel skipped over and overlooked; so he has to survive to keep the ending satisfying. I rewatched Fellowship of the Ring EE yesterday and I was struck by how much more effectively the death scenes in that movie are handled.